There is a Hadith in Jame’ Tirmidhi, Sunan Nasai, and Sunan Ibn Majah:
Translation of Hadith: It is narrated on the authority of Hadhrat Abdullah Bin Mas'ud that the Holy Prophet (Sallallahu alaihi wa sallam) said: You keep on performing Haj and ‘Umrah as Haj and ‘Umrah wipe out poverty and sins the way a furnace cleanses iron, gold and silver, etc. (Jame’ Tirmidhi, Hadith No: 810; Sunan Nasai, Hadith No: 2630; Sunan Ibn Majah, Hadith No: 2887)
There is a Hadith in Sahih Bukhari and Sahih Muslim:
Translation of Hadith: It is narrated on the authority of Hadhrat Abu Hurairah (May Allah be well pleased with him) that the Holy Prophet (Sallallahu alaihi wa sallam) said: One ‘Umrah is the expiation of sins until another ‘Umrah and the reward for an accepted Haj is nothing but Jannah. (Sahih Bukhari, Hadith No: 1773; Sahih Muslim, Hadith No: 3355)
There is a Hadith in Sunan Ibn Majah:
Translation of Hadith: It is narrated on the authority of Hadhrat Abu Hurairah (May Allah be well pleased with him) that the Holy Prophet (Sallallahu alaihi wa sallam) said: Those who perform Haj and ‘Umrah are the guests of Allah (Subhanahu Wa Ta’ala). If they ask anything of Allah (Subhanahu Wa Ta’ala), He accepts it and if they ask for pardon, He forgives them.